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ba4e7d97 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | /* | |
28 | * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> | |
29 | */ | |
30 | ||
760285e7 DH |
31 | #include <drm/ttm/ttm_bo_driver.h> |
32 | #include <drm/ttm/ttm_placement.h> | |
72525b3f | 33 | #include <drm/drm_vma_manager.h> |
ba4e7d97 TH |
34 | #include <linux/io.h> |
35 | #include <linux/highmem.h> | |
36 | #include <linux/wait.h> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
ba4e7d97 | 38 | #include <linux/vmalloc.h> |
ba4e7d97 | 39 | #include <linux/module.h> |
f2c24b83 | 40 | #include <linux/reservation.h> |
ba4e7d97 TH |
41 | |
42 | void ttm_bo_free_old_node(struct ttm_buffer_object *bo) | |
43 | { | |
42311ff9 | 44 | ttm_bo_mem_put(bo, &bo->mem); |
ba4e7d97 TH |
45 | } |
46 | ||
47 | int ttm_bo_move_ttm(struct ttm_buffer_object *bo, | |
97a875cb | 48 | bool evict, |
9d87fa21 | 49 | bool no_wait_gpu, struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
50 | { |
51 | struct ttm_tt *ttm = bo->ttm; | |
52 | struct ttm_mem_reg *old_mem = &bo->mem; | |
ba4e7d97 TH |
53 | int ret; |
54 | ||
55 | if (old_mem->mem_type != TTM_PL_SYSTEM) { | |
ba4e7d97 TH |
56 | ttm_bo_free_old_node(bo); |
57 | ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM, | |
58 | TTM_PL_MASK_MEM); | |
59 | old_mem->mem_type = TTM_PL_SYSTEM; | |
ba4e7d97 TH |
60 | } |
61 | ||
62 | ret = ttm_tt_set_placement_caching(ttm, new_mem->placement); | |
63 | if (unlikely(ret != 0)) | |
64 | return ret; | |
65 | ||
66 | if (new_mem->mem_type != TTM_PL_SYSTEM) { | |
67 | ret = ttm_tt_bind(ttm, new_mem); | |
68 | if (unlikely(ret != 0)) | |
69 | return ret; | |
70 | } | |
71 | ||
72 | *old_mem = *new_mem; | |
73 | new_mem->mm_node = NULL; | |
110b20c3 | 74 | |
ba4e7d97 TH |
75 | return 0; |
76 | } | |
77 | EXPORT_SYMBOL(ttm_bo_move_ttm); | |
78 | ||
eba67093 | 79 | int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) |
82c5da6b | 80 | { |
eba67093 TH |
81 | if (likely(man->io_reserve_fastpath)) |
82 | return 0; | |
83 | ||
84 | if (interruptible) | |
85 | return mutex_lock_interruptible(&man->io_reserve_mutex); | |
86 | ||
87 | mutex_lock(&man->io_reserve_mutex); | |
88 | return 0; | |
89 | } | |
afe6804c | 90 | EXPORT_SYMBOL(ttm_mem_io_lock); |
82c5da6b | 91 | |
eba67093 TH |
92 | void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) |
93 | { | |
94 | if (likely(man->io_reserve_fastpath)) | |
95 | return; | |
96 | ||
97 | mutex_unlock(&man->io_reserve_mutex); | |
98 | } | |
afe6804c | 99 | EXPORT_SYMBOL(ttm_mem_io_unlock); |
eba67093 TH |
100 | |
101 | static int ttm_mem_io_evict(struct ttm_mem_type_manager *man) | |
102 | { | |
103 | struct ttm_buffer_object *bo; | |
104 | ||
105 | if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru)) | |
106 | return -EAGAIN; | |
107 | ||
108 | bo = list_first_entry(&man->io_reserve_lru, | |
109 | struct ttm_buffer_object, | |
110 | io_reserve_lru); | |
111 | list_del_init(&bo->io_reserve_lru); | |
112 | ttm_bo_unmap_virtual_locked(bo); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
afe6804c DA |
117 | |
118 | int ttm_mem_io_reserve(struct ttm_bo_device *bdev, | |
119 | struct ttm_mem_reg *mem) | |
eba67093 TH |
120 | { |
121 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
122 | int ret = 0; | |
123 | ||
124 | if (!bdev->driver->io_mem_reserve) | |
125 | return 0; | |
126 | if (likely(man->io_reserve_fastpath)) | |
127 | return bdev->driver->io_mem_reserve(bdev, mem); | |
128 | ||
129 | if (bdev->driver->io_mem_reserve && | |
130 | mem->bus.io_reserved_count++ == 0) { | |
131 | retry: | |
0c321c79 | 132 | ret = bdev->driver->io_mem_reserve(bdev, mem); |
eba67093 TH |
133 | if (ret == -EAGAIN) { |
134 | ret = ttm_mem_io_evict(man); | |
135 | if (ret == 0) | |
136 | goto retry; | |
137 | } | |
138 | } | |
139 | return ret; | |
140 | } | |
afe6804c | 141 | EXPORT_SYMBOL(ttm_mem_io_reserve); |
eba67093 | 142 | |
afe6804c DA |
143 | void ttm_mem_io_free(struct ttm_bo_device *bdev, |
144 | struct ttm_mem_reg *mem) | |
eba67093 TH |
145 | { |
146 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; | |
147 | ||
148 | if (likely(man->io_reserve_fastpath)) | |
149 | return; | |
150 | ||
151 | if (bdev->driver->io_mem_reserve && | |
152 | --mem->bus.io_reserved_count == 0 && | |
153 | bdev->driver->io_mem_free) | |
154 | bdev->driver->io_mem_free(bdev, mem); | |
155 | ||
156 | } | |
afe6804c | 157 | EXPORT_SYMBOL(ttm_mem_io_free); |
eba67093 TH |
158 | |
159 | int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo) | |
160 | { | |
161 | struct ttm_mem_reg *mem = &bo->mem; | |
162 | int ret; | |
163 | ||
164 | if (!mem->bus.io_reserved_vm) { | |
165 | struct ttm_mem_type_manager *man = | |
166 | &bo->bdev->man[mem->mem_type]; | |
167 | ||
168 | ret = ttm_mem_io_reserve(bo->bdev, mem); | |
82c5da6b JG |
169 | if (unlikely(ret != 0)) |
170 | return ret; | |
eba67093 TH |
171 | mem->bus.io_reserved_vm = true; |
172 | if (man->use_io_reserve_lru) | |
173 | list_add_tail(&bo->io_reserve_lru, | |
174 | &man->io_reserve_lru); | |
82c5da6b JG |
175 | } |
176 | return 0; | |
177 | } | |
178 | ||
eba67093 | 179 | void ttm_mem_io_free_vm(struct ttm_buffer_object *bo) |
82c5da6b | 180 | { |
eba67093 TH |
181 | struct ttm_mem_reg *mem = &bo->mem; |
182 | ||
183 | if (mem->bus.io_reserved_vm) { | |
184 | mem->bus.io_reserved_vm = false; | |
185 | list_del_init(&bo->io_reserve_lru); | |
186 | ttm_mem_io_free(bo->bdev, mem); | |
82c5da6b JG |
187 | } |
188 | } | |
189 | ||
dcbff15a | 190 | static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, |
ba4e7d97 TH |
191 | void **virtual) |
192 | { | |
eba67093 | 193 | struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; |
ba4e7d97 TH |
194 | int ret; |
195 | void *addr; | |
196 | ||
197 | *virtual = NULL; | |
eba67093 | 198 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 199 | ret = ttm_mem_io_reserve(bdev, mem); |
eba67093 | 200 | ttm_mem_io_unlock(man); |
9e51159c | 201 | if (ret || !mem->bus.is_iomem) |
ba4e7d97 TH |
202 | return ret; |
203 | ||
82c5da6b JG |
204 | if (mem->bus.addr) { |
205 | addr = mem->bus.addr; | |
206 | } else { | |
ba4e7d97 | 207 | if (mem->placement & TTM_PL_FLAG_WC) |
82c5da6b | 208 | addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size); |
ba4e7d97 | 209 | else |
82c5da6b JG |
210 | addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size); |
211 | if (!addr) { | |
eba67093 | 212 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 213 | ttm_mem_io_free(bdev, mem); |
eba67093 | 214 | ttm_mem_io_unlock(man); |
ba4e7d97 | 215 | return -ENOMEM; |
82c5da6b | 216 | } |
ba4e7d97 TH |
217 | } |
218 | *virtual = addr; | |
219 | return 0; | |
220 | } | |
221 | ||
dcbff15a | 222 | static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem, |
ba4e7d97 TH |
223 | void *virtual) |
224 | { | |
225 | struct ttm_mem_type_manager *man; | |
226 | ||
227 | man = &bdev->man[mem->mem_type]; | |
228 | ||
0c321c79 | 229 | if (virtual && mem->bus.addr == NULL) |
ba4e7d97 | 230 | iounmap(virtual); |
eba67093 | 231 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 232 | ttm_mem_io_free(bdev, mem); |
eba67093 | 233 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
234 | } |
235 | ||
236 | static int ttm_copy_io_page(void *dst, void *src, unsigned long page) | |
237 | { | |
238 | uint32_t *dstP = | |
239 | (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT)); | |
240 | uint32_t *srcP = | |
241 | (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT)); | |
242 | ||
243 | int i; | |
244 | for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i) | |
245 | iowrite32(ioread32(srcP++), dstP++); | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src, | |
542c6f6d TH |
250 | unsigned long page, |
251 | pgprot_t prot) | |
ba4e7d97 | 252 | { |
b1e5f172 | 253 | struct page *d = ttm->pages[page]; |
ba4e7d97 TH |
254 | void *dst; |
255 | ||
256 | if (!d) | |
257 | return -ENOMEM; | |
258 | ||
259 | src = (void *)((unsigned long)src + (page << PAGE_SHIFT)); | |
542c6f6d TH |
260 | |
261 | #ifdef CONFIG_X86 | |
3e4d3af5 | 262 | dst = kmap_atomic_prot(d, prot); |
542c6f6d | 263 | #else |
6d0897ba | 264 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
265 | dst = vmap(&d, 1, 0, prot); |
266 | else | |
267 | dst = kmap(d); | |
268 | #endif | |
ba4e7d97 TH |
269 | if (!dst) |
270 | return -ENOMEM; | |
271 | ||
272 | memcpy_fromio(dst, src, PAGE_SIZE); | |
542c6f6d TH |
273 | |
274 | #ifdef CONFIG_X86 | |
3e4d3af5 | 275 | kunmap_atomic(dst); |
542c6f6d | 276 | #else |
6d0897ba | 277 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
278 | vunmap(dst); |
279 | else | |
280 | kunmap(d); | |
281 | #endif | |
282 | ||
ba4e7d97 TH |
283 | return 0; |
284 | } | |
285 | ||
286 | static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst, | |
542c6f6d TH |
287 | unsigned long page, |
288 | pgprot_t prot) | |
ba4e7d97 | 289 | { |
b1e5f172 | 290 | struct page *s = ttm->pages[page]; |
ba4e7d97 TH |
291 | void *src; |
292 | ||
293 | if (!s) | |
294 | return -ENOMEM; | |
295 | ||
296 | dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT)); | |
542c6f6d | 297 | #ifdef CONFIG_X86 |
3e4d3af5 | 298 | src = kmap_atomic_prot(s, prot); |
542c6f6d | 299 | #else |
6d0897ba | 300 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
301 | src = vmap(&s, 1, 0, prot); |
302 | else | |
303 | src = kmap(s); | |
304 | #endif | |
ba4e7d97 TH |
305 | if (!src) |
306 | return -ENOMEM; | |
307 | ||
308 | memcpy_toio(dst, src, PAGE_SIZE); | |
542c6f6d TH |
309 | |
310 | #ifdef CONFIG_X86 | |
3e4d3af5 | 311 | kunmap_atomic(src); |
542c6f6d | 312 | #else |
6d0897ba | 313 | if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) |
542c6f6d TH |
314 | vunmap(src); |
315 | else | |
316 | kunmap(s); | |
317 | #endif | |
318 | ||
ba4e7d97 TH |
319 | return 0; |
320 | } | |
321 | ||
322 | int ttm_bo_move_memcpy(struct ttm_buffer_object *bo, | |
77dfc28b CK |
323 | bool evict, bool interruptible, |
324 | bool no_wait_gpu, | |
9d87fa21 | 325 | struct ttm_mem_reg *new_mem) |
ba4e7d97 TH |
326 | { |
327 | struct ttm_bo_device *bdev = bo->bdev; | |
328 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; | |
329 | struct ttm_tt *ttm = bo->ttm; | |
330 | struct ttm_mem_reg *old_mem = &bo->mem; | |
e22469ca | 331 | struct ttm_mem_reg old_copy = *old_mem; |
ba4e7d97 TH |
332 | void *old_iomap; |
333 | void *new_iomap; | |
334 | int ret; | |
ba4e7d97 TH |
335 | unsigned long i; |
336 | unsigned long page; | |
337 | unsigned long add = 0; | |
338 | int dir; | |
339 | ||
77dfc28b CK |
340 | ret = ttm_bo_wait(bo, interruptible, no_wait_gpu); |
341 | if (ret) | |
342 | return ret; | |
343 | ||
ba4e7d97 TH |
344 | ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap); |
345 | if (ret) | |
346 | return ret; | |
347 | ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap); | |
348 | if (ret) | |
349 | goto out; | |
350 | ||
da95c788 TH |
351 | /* |
352 | * Single TTM move. NOP. | |
353 | */ | |
ba4e7d97 TH |
354 | if (old_iomap == NULL && new_iomap == NULL) |
355 | goto out2; | |
da95c788 TH |
356 | |
357 | /* | |
0bc25425 | 358 | * Don't move nonexistent data. Clear destination instead. |
da95c788 | 359 | */ |
0bc25425 | 360 | if (old_iomap == NULL && |
2e6d8b46 TH |
361 | (ttm == NULL || (ttm->state == tt_unpopulated && |
362 | !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) { | |
0bc25425 | 363 | memset_io(new_iomap, 0, new_mem->num_pages*PAGE_SIZE); |
ba4e7d97 | 364 | goto out2; |
0bc25425 | 365 | } |
ba4e7d97 | 366 | |
da95c788 TH |
367 | /* |
368 | * TTM might be null for moves within the same region. | |
9a0599dd JB |
369 | */ |
370 | if (ttm && ttm->state == tt_unpopulated) { | |
b1e5f172 | 371 | ret = ttm->bdev->driver->ttm_tt_populate(ttm); |
da95c788 | 372 | if (ret) |
b1e5f172 JG |
373 | goto out1; |
374 | } | |
375 | ||
ba4e7d97 TH |
376 | add = 0; |
377 | dir = 1; | |
378 | ||
379 | if ((old_mem->mem_type == new_mem->mem_type) && | |
d961db75 | 380 | (new_mem->start < old_mem->start + old_mem->size)) { |
ba4e7d97 TH |
381 | dir = -1; |
382 | add = new_mem->num_pages - 1; | |
383 | } | |
384 | ||
385 | for (i = 0; i < new_mem->num_pages; ++i) { | |
386 | page = i * dir + add; | |
542c6f6d TH |
387 | if (old_iomap == NULL) { |
388 | pgprot_t prot = ttm_io_prot(old_mem->placement, | |
389 | PAGE_KERNEL); | |
390 | ret = ttm_copy_ttm_io_page(ttm, new_iomap, page, | |
391 | prot); | |
392 | } else if (new_iomap == NULL) { | |
393 | pgprot_t prot = ttm_io_prot(new_mem->placement, | |
394 | PAGE_KERNEL); | |
395 | ret = ttm_copy_io_ttm_page(ttm, old_iomap, page, | |
396 | prot); | |
397 | } else | |
ba4e7d97 | 398 | ret = ttm_copy_io_page(new_iomap, old_iomap, page); |
da95c788 | 399 | if (ret) |
ba4e7d97 TH |
400 | goto out1; |
401 | } | |
402 | mb(); | |
403 | out2: | |
eba67093 | 404 | old_copy = *old_mem; |
ba4e7d97 TH |
405 | *old_mem = *new_mem; |
406 | new_mem->mm_node = NULL; | |
ba4e7d97 | 407 | |
4279cb14 | 408 | if (man->flags & TTM_MEMTYPE_FLAG_FIXED) { |
ba4e7d97 TH |
409 | ttm_tt_destroy(ttm); |
410 | bo->ttm = NULL; | |
411 | } | |
412 | ||
413 | out1: | |
eba67093 | 414 | ttm_mem_reg_iounmap(bdev, old_mem, new_iomap); |
ba4e7d97 TH |
415 | out: |
416 | ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap); | |
da95c788 TH |
417 | |
418 | /* | |
419 | * On error, keep the mm node! | |
420 | */ | |
421 | if (!ret) | |
422 | ttm_bo_mem_put(bo, &old_copy); | |
ba4e7d97 TH |
423 | return ret; |
424 | } | |
425 | EXPORT_SYMBOL(ttm_bo_move_memcpy); | |
426 | ||
427 | static void ttm_transfered_destroy(struct ttm_buffer_object *bo) | |
428 | { | |
429 | kfree(bo); | |
430 | } | |
431 | ||
432 | /** | |
433 | * ttm_buffer_object_transfer | |
434 | * | |
435 | * @bo: A pointer to a struct ttm_buffer_object. | |
436 | * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object, | |
437 | * holding the data of @bo with the old placement. | |
438 | * | |
439 | * This is a utility function that may be called after an accelerated move | |
440 | * has been scheduled. A new buffer object is created as a placeholder for | |
441 | * the old data while it's being copied. When that buffer object is idle, | |
442 | * it can be destroyed, releasing the space of the old placement. | |
443 | * Returns: | |
444 | * !0: Failure. | |
445 | */ | |
446 | ||
447 | static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo, | |
448 | struct ttm_buffer_object **new_obj) | |
449 | { | |
450 | struct ttm_buffer_object *fbo; | |
5e338405 | 451 | int ret; |
ba4e7d97 | 452 | |
ff7c60c5 | 453 | fbo = kmalloc(sizeof(*fbo), GFP_KERNEL); |
ba4e7d97 TH |
454 | if (!fbo) |
455 | return -ENOMEM; | |
456 | ||
457 | *fbo = *bo; | |
458 | ||
459 | /** | |
460 | * Fix up members that we shouldn't copy directly: | |
461 | * TODO: Explicit member copy would probably be better here. | |
462 | */ | |
463 | ||
ba4e7d97 TH |
464 | INIT_LIST_HEAD(&fbo->ddestroy); |
465 | INIT_LIST_HEAD(&fbo->lru); | |
466 | INIT_LIST_HEAD(&fbo->swap); | |
eba67093 | 467 | INIT_LIST_HEAD(&fbo->io_reserve_lru); |
5bc73067 | 468 | fbo->moving = NULL; |
72525b3f | 469 | drm_vma_node_reset(&fbo->vma_node); |
0fbecd40 | 470 | atomic_set(&fbo->cpu_writers, 0); |
ba4e7d97 | 471 | |
ba4e7d97 TH |
472 | kref_init(&fbo->list_kref); |
473 | kref_init(&fbo->kref); | |
474 | fbo->destroy = &ttm_transfered_destroy; | |
57de4ba9 | 475 | fbo->acc_size = 0; |
5e338405 ML |
476 | fbo->resv = &fbo->ttm_resv; |
477 | reservation_object_init(fbo->resv); | |
478 | ret = ww_mutex_trylock(&fbo->resv->lock); | |
479 | WARN_ON(!ret); | |
ba4e7d97 TH |
480 | |
481 | *new_obj = fbo; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp) | |
486 | { | |
94318d50 BH |
487 | /* Cached mappings need no adjustment */ |
488 | if (caching_flags & TTM_PL_FLAG_CACHED) | |
489 | return tmp; | |
490 | ||
ba4e7d97 TH |
491 | #if defined(__i386__) || defined(__x86_64__) |
492 | if (caching_flags & TTM_PL_FLAG_WC) | |
493 | tmp = pgprot_writecombine(tmp); | |
494 | else if (boot_cpu_data.x86 > 3) | |
495 | tmp = pgprot_noncached(tmp); | |
ba4e7d97 | 496 | #endif |
f135b978 AC |
497 | #if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \ |
498 | defined(__powerpc__) | |
ba4e7d97 TH |
499 | if (caching_flags & TTM_PL_FLAG_WC) |
500 | tmp = pgprot_writecombine(tmp); | |
501 | else | |
502 | tmp = pgprot_noncached(tmp); | |
503 | #endif | |
04cf55e1 | 504 | #if defined(__sparc__) || defined(__mips__) |
94318d50 | 505 | tmp = pgprot_noncached(tmp); |
ba4e7d97 TH |
506 | #endif |
507 | return tmp; | |
508 | } | |
4bfd75cb | 509 | EXPORT_SYMBOL(ttm_io_prot); |
ba4e7d97 TH |
510 | |
511 | static int ttm_bo_ioremap(struct ttm_buffer_object *bo, | |
82c5da6b JG |
512 | unsigned long offset, |
513 | unsigned long size, | |
ba4e7d97 TH |
514 | struct ttm_bo_kmap_obj *map) |
515 | { | |
ba4e7d97 | 516 | struct ttm_mem_reg *mem = &bo->mem; |
ba4e7d97 | 517 | |
82c5da6b | 518 | if (bo->mem.bus.addr) { |
ba4e7d97 | 519 | map->bo_kmap_type = ttm_bo_map_premapped; |
82c5da6b | 520 | map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset); |
ba4e7d97 TH |
521 | } else { |
522 | map->bo_kmap_type = ttm_bo_map_iomap; | |
523 | if (mem->placement & TTM_PL_FLAG_WC) | |
82c5da6b JG |
524 | map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset, |
525 | size); | |
ba4e7d97 | 526 | else |
82c5da6b JG |
527 | map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset, |
528 | size); | |
ba4e7d97 TH |
529 | } |
530 | return (!map->virtual) ? -ENOMEM : 0; | |
531 | } | |
532 | ||
533 | static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo, | |
534 | unsigned long start_page, | |
535 | unsigned long num_pages, | |
536 | struct ttm_bo_kmap_obj *map) | |
537 | { | |
538 | struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot; | |
539 | struct ttm_tt *ttm = bo->ttm; | |
b1e5f172 | 540 | int ret; |
ba4e7d97 TH |
541 | |
542 | BUG_ON(!ttm); | |
b1e5f172 JG |
543 | |
544 | if (ttm->state == tt_unpopulated) { | |
545 | ret = ttm->bdev->driver->ttm_tt_populate(ttm); | |
546 | if (ret) | |
547 | return ret; | |
548 | } | |
549 | ||
ba4e7d97 TH |
550 | if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) { |
551 | /* | |
552 | * We're mapping a single page, and the desired | |
553 | * page protection is consistent with the bo. | |
554 | */ | |
555 | ||
556 | map->bo_kmap_type = ttm_bo_map_kmap; | |
b1e5f172 | 557 | map->page = ttm->pages[start_page]; |
ba4e7d97 TH |
558 | map->virtual = kmap(map->page); |
559 | } else { | |
ba4e7d97 TH |
560 | /* |
561 | * We need to use vmap to get the desired page protection | |
af901ca1 | 562 | * or to make the buffer object look contiguous. |
ba4e7d97 | 563 | */ |
94318d50 | 564 | prot = ttm_io_prot(mem->placement, PAGE_KERNEL); |
ba4e7d97 TH |
565 | map->bo_kmap_type = ttm_bo_map_vmap; |
566 | map->virtual = vmap(ttm->pages + start_page, num_pages, | |
567 | 0, prot); | |
568 | } | |
569 | return (!map->virtual) ? -ENOMEM : 0; | |
570 | } | |
571 | ||
572 | int ttm_bo_kmap(struct ttm_buffer_object *bo, | |
573 | unsigned long start_page, unsigned long num_pages, | |
574 | struct ttm_bo_kmap_obj *map) | |
575 | { | |
eba67093 TH |
576 | struct ttm_mem_type_manager *man = |
577 | &bo->bdev->man[bo->mem.mem_type]; | |
82c5da6b | 578 | unsigned long offset, size; |
ba4e7d97 | 579 | int ret; |
ba4e7d97 TH |
580 | |
581 | BUG_ON(!list_empty(&bo->swap)); | |
582 | map->virtual = NULL; | |
82c5da6b | 583 | map->bo = bo; |
ba4e7d97 TH |
584 | if (num_pages > bo->num_pages) |
585 | return -EINVAL; | |
586 | if (start_page > bo->num_pages) | |
587 | return -EINVAL; | |
588 | #if 0 | |
4cda878b | 589 | if (num_pages > 1 && !capable(CAP_SYS_ADMIN)) |
ba4e7d97 TH |
590 | return -EPERM; |
591 | #endif | |
eba67093 | 592 | (void) ttm_mem_io_lock(man, false); |
82c5da6b | 593 | ret = ttm_mem_io_reserve(bo->bdev, &bo->mem); |
eba67093 | 594 | ttm_mem_io_unlock(man); |
ba4e7d97 TH |
595 | if (ret) |
596 | return ret; | |
82c5da6b | 597 | if (!bo->mem.bus.is_iomem) { |
ba4e7d97 TH |
598 | return ttm_bo_kmap_ttm(bo, start_page, num_pages, map); |
599 | } else { | |
82c5da6b JG |
600 | offset = start_page << PAGE_SHIFT; |
601 | size = num_pages << PAGE_SHIFT; | |
602 | return ttm_bo_ioremap(bo, offset, size, map); | |
ba4e7d97 TH |
603 | } |
604 | } | |
605 | EXPORT_SYMBOL(ttm_bo_kmap); | |
606 | ||
607 | void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map) | |
608 | { | |
eba67093 TH |
609 | struct ttm_buffer_object *bo = map->bo; |
610 | struct ttm_mem_type_manager *man = | |
611 | &bo->bdev->man[bo->mem.mem_type]; | |
612 | ||
ba4e7d97 TH |
613 | if (!map->virtual) |
614 | return; | |
615 | switch (map->bo_kmap_type) { | |
616 | case ttm_bo_map_iomap: | |
617 | iounmap(map->virtual); | |
618 | break; | |
619 | case ttm_bo_map_vmap: | |
620 | vunmap(map->virtual); | |
621 | break; | |
622 | case ttm_bo_map_kmap: | |
623 | kunmap(map->page); | |
624 | break; | |
625 | case ttm_bo_map_premapped: | |
626 | break; | |
627 | default: | |
628 | BUG(); | |
629 | } | |
eba67093 TH |
630 | (void) ttm_mem_io_lock(man, false); |
631 | ttm_mem_io_free(map->bo->bdev, &map->bo->mem); | |
632 | ttm_mem_io_unlock(man); | |
ba4e7d97 TH |
633 | map->virtual = NULL; |
634 | map->page = NULL; | |
635 | } | |
636 | EXPORT_SYMBOL(ttm_bo_kunmap); | |
637 | ||
ba4e7d97 | 638 | int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo, |
f2c24b83 | 639 | struct fence *fence, |
97a875cb | 640 | bool evict, |
ba4e7d97 TH |
641 | struct ttm_mem_reg *new_mem) |
642 | { | |
643 | struct ttm_bo_device *bdev = bo->bdev; | |
ba4e7d97 TH |
644 | struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type]; |
645 | struct ttm_mem_reg *old_mem = &bo->mem; | |
646 | int ret; | |
ba4e7d97 | 647 | struct ttm_buffer_object *ghost_obj; |
ba4e7d97 | 648 | |
f2c24b83 | 649 | reservation_object_add_excl_fence(bo->resv, fence); |
ba4e7d97 | 650 | if (evict) { |
8aa6d4fc | 651 | ret = ttm_bo_wait(bo, false, false); |
ba4e7d97 TH |
652 | if (ret) |
653 | return ret; | |
654 | ||
4279cb14 | 655 | if (man->flags & TTM_MEMTYPE_FLAG_FIXED) { |
ba4e7d97 TH |
656 | ttm_tt_destroy(bo->ttm); |
657 | bo->ttm = NULL; | |
658 | } | |
eac20953 | 659 | ttm_bo_free_old_node(bo); |
ba4e7d97 TH |
660 | } else { |
661 | /** | |
662 | * This should help pipeline ordinary buffer moves. | |
663 | * | |
664 | * Hang old buffer memory on a new buffer object, | |
665 | * and leave it to be released when the GPU | |
666 | * operation has completed. | |
667 | */ | |
668 | ||
5bc73067 CK |
669 | fence_put(bo->moving); |
670 | bo->moving = fence_get(fence); | |
ba4e7d97 | 671 | |
ff7c60c5 | 672 | ret = ttm_buffer_object_transfer(bo, &ghost_obj); |
ba4e7d97 TH |
673 | if (ret) |
674 | return ret; | |
675 | ||
f2c24b83 ML |
676 | reservation_object_add_excl_fence(ghost_obj->resv, fence); |
677 | ||
ba4e7d97 TH |
678 | /** |
679 | * If we're not moving to fixed memory, the TTM object | |
680 | * needs to stay alive. Otherwhise hang it on the ghost | |
681 | * bo to be unbound and destroyed. | |
682 | */ | |
683 | ||
684 | if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) | |
685 | ghost_obj->ttm = NULL; | |
686 | else | |
687 | bo->ttm = NULL; | |
688 | ||
689 | ttm_bo_unreserve(ghost_obj); | |
690 | ttm_bo_unref(&ghost_obj); | |
691 | } | |
692 | ||
693 | *old_mem = *new_mem; | |
694 | new_mem->mm_node = NULL; | |
110b20c3 | 695 | |
ba4e7d97 TH |
696 | return 0; |
697 | } | |
698 | EXPORT_SYMBOL(ttm_bo_move_accel_cleanup); |